Frequencies for first 10,000 rows of ca_cleft variable in natl2013 dataset :

  Cleft Lip |
  w/ or w/o |
      Cleft |
 Palate RFP |
642=f_ca_cl |
     eflp R |      Freq.     Percent        Cum.
------------+-----------------------------------
          N |      9,988       99.88       99.88
          Y |         12        0.12      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015